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Finding the Fourth Proportional to 1,015.62, 1,524.06 and 399.22

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Solution

The fourth proportional to 1,015.62, 1,524.06 and 399.22 is: 599.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,015.62 : 1,524.06 = 399.22 : x
  2. Step 2: Convert to fraction form
    1,015.62/1,524.06 = 399.22/x
  3. Step 3: Cross multiply
    1,015.62x = 1,524.06 × 399.22
  4. Step 4: Simplify right side
    1,015.62x = 608,431.42
  5. Step 5: Solve for x
    x = 608,431.42/1,015.62
  6. Step 6: Final answer
    x = 599.07

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.